﻿@namespace Blazorise.Docs.Docs.Examples

<Paragraph>
    <Button Color="Color.Primary" Clicked="LoadState">Load State</Button>
    <Button Color="Color.Success" Clicked="SaveState">Save State</Button>
    <Button Color="Color.Light" Clicked="ResetState">Reset State</Button>
</Paragraph>

<DataGrid @ref="dataGridRef"
          TItem="Employee"
          Data="inMemoryData"
          Responsive
          Editable
          Filterable
          ShowPager
          ShowPageSizes
          ShowColumnChooser
          PagerPosition="DataGridPagerPosition.Top">
    <DataGridColumns>
        <DataGridColumn TextAlignment="TextAlignment.Center" TItem="Employee" Field="@nameof( Employee.Id )" Caption="#" Width="60px" />
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.FirstName )" Caption="First Name">
        </DataGridColumn>
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.LastName )" Caption="Last Name" />
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.Email )" Caption="Email" />
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.City )" Caption="City">
            <CaptionTemplate>
                <Icon Name="IconName.City" /> @context.Caption
            </CaptionTemplate>
        </DataGridColumn>
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.Zip )" Caption="Zip">
        </DataGridColumn>
        <DataGridDateColumn TItem="Employee" Field="@nameof( Employee.DateOfBirth )" DisplayFormat="{0:dd.MM.yyyy}" Caption="Date Of Birth" Editable />
        <DataGridNumericColumn TItem="Employee" Field="@nameof( Employee.Childrens )" Caption="Childrens" ReverseSorting="true" Editable Filterable="false" />
        <DataGridSelectColumn TItem="Employee" Field="@nameof( Employee.Gender )" Caption="Gender" Editable Data="EmployeeData.Genders" ValueField="(x) => ((Gender)x).Code" TextField="(x) => ((Gender)x).Description" />
        <DataGridColumn TItem="Employee" Field="@nameof( Employee.Salary )" Caption="Salary" Editable Width="140px" DisplayFormat="{0:C}" DisplayFormatProvider="@System.Globalization.CultureInfo.GetCultureInfo("fr-FR")" TextAlignment="TextAlignment.End">
        </DataGridColumn>
        <DataGridCheckColumn TItem="Employee" Field="@nameof(Employee.IsActive)" Caption="Active" Editable Filterable="false">
            <DisplayTemplate>
                <Check TValue="bool" Checked="context.IsActive" Disabled ReadOnly />
            </DisplayTemplate>
        </DataGridCheckColumn>
    </DataGridColumns>
</DataGrid>

@code {
    [Inject] Blazored.LocalStorage.ILocalStorageService LocalStorage { get; set; }
    [Inject] EmployeeData EmployeeData { get; set; }

    private const string STORAGE_KEY = "__DATAGRID_STATE__";
    private DataGrid<Employee> dataGridRef;
    private IEnumerable<Employee> inMemoryData;

    protected override async Task OnInitializedAsync()
    {
        inMemoryData = ( await EmployeeData.GetDataAsync().ConfigureAwait( false ) ).Take( 25 );
        await base.OnInitializedAsync();
    }

    protected async override Task OnAfterRenderAsync( bool firstRender )
    {
        if ( firstRender )
        {
            await LoadState();
        }

        await base.OnAfterRenderAsync( firstRender );
    }

    private async Task ResetState()
    {
        await LocalStorage.RemoveItemAsync( STORAGE_KEY );

        var state = new DataGridState<Employee>()
        {
            CurrentPage = 1,
            PageSize = 10,
        };

        await dataGridRef.LoadState( state );
    }

    private async Task LoadState()
    {
        var stateFromLocalStorage = await LocalStorage.GetItemAsync<DataGridState<Employee>>( STORAGE_KEY );

        if ( stateFromLocalStorage is not null )
        {
            //It is of note that we must make sure the reference is contained in the DataGrid Data collection.
            if ( stateFromLocalStorage.SelectedRow is not null )
            {
                stateFromLocalStorage.SelectedRow = inMemoryData.FirstOrDefault( x => x.Id == stateFromLocalStorage.SelectedRow.Id );
            }
            if ( stateFromLocalStorage.EditItem is not null )
            {
                stateFromLocalStorage.EditItem = inMemoryData.FirstOrDefault( x => x.Id == stateFromLocalStorage.EditItem.Id );
            }
            await dataGridRef.LoadState( stateFromLocalStorage );
            return;
        }
    }

    private async Task SaveState()
    {
        var state = await dataGridRef.GetState();
        await LocalStorage.SetItemAsync( STORAGE_KEY, state );
    }
}